30+ Interview Questions and Answers

G-code and M-code are programming languages used in CNC machines to control their movements and operations.

• G-code is used to control the movement of the machine, such as its speed, position, and direction.

• M-code is used to control the machine's auxiliary functions, such as turning on and off the spindle or coolant.

• Both G-code and M-code are written in a specific format and can be edited using a text editor or specialized software.

• Examples of G-code commands include G00 (rapid...read more

CNC machines play a crucial role in the company's manufacturing process.

• CNC machines automate the manufacturing process, reducing human error and increasing efficiency.

• They can produce complex and precise parts that would be difficult or impossible to make by hand.

• CNC machines can be programmed to produce large quantities of parts with consistent quality.

• They are used in a variety of industries, including aerospace, automotive, and medical device manufacturing.

• Examples of CNC...read more

Different motions in a drone are achieved through varying the speed and direction of the propellers.

• Changing the speed of the propellers controls the altitude of the drone.

• Varying the speed of propellers on different sides of the drone allows it to move forward, backward, left, or right.

• Adjusting the speed of the propellers diagonally creates rotational motion for turning.

• Combining these motions enables the drone to perform complex maneuvers like flips and rolls.

Motor is connected to PLC using motor starters or variable frequency drives. PID controller is used for precise control. Fans typically use induction motors. Inrush current is the initial surge of current when a motor starts. Starting current is usually higher than running current.

• Motor is connected to PLC using motor starters or variable frequency drives

• PID controller is used for precise control of motor speed or position

• Fans typically use induction motors for their simplici...read more

Spring created via literal is created using curly braces with key-value pairs, while spring created via object is created using a constructor function.

• Spring created via literal: var spring = { color: 'blue', length: 10 };

• Spring created via object: function Spring(color, length) { this.color = color; this.length = length; }

Lathe machine is used for turning and shaping cylindrical workpieces while milling machine is used for cutting and shaping flat or irregularly shaped workpieces.

• Lathe machine rotates the workpiece while the cutting tool remains stationary, while milling machine rotates the cutting tool while the workpiece remains stationary.

• Lathe machine is used for producing cylindrical shapes like shafts, rods, and bushings, while milling machine is used for producing flat or irregularly sh...read more

Robots play a significant role in human life by performing tasks that are dangerous, repetitive, or impossible for humans.

• Robots can be used in manufacturing to increase efficiency and reduce human error.

• Robots can be used in healthcare to perform surgeries and assist with patient care.

• Robots can be used in exploration to gather data in environments that are too dangerous for humans.

• Robots can be used in agriculture to automate tasks such as planting and harvesting crops.

• Robo...read more

Vertical milling machines have a spindle that moves vertically while horizontal milling machines have a spindle that moves horizontally.

• Vertical milling machines are better suited for cutting and drilling metal sheets and plates.

• Horizontal milling machines are better suited for cutting and shaping solid materials like wood and plastics.

• Vertical milling machines are typically used for producing small to medium-sized parts.

• Horizontal milling machines are typically used for prod...read more

Inheritance is a way to create new classes based on existing ones. ArrayList is a dynamic array implementation in Java.

• Inheritance allows a subclass to inherit properties and methods from a superclass.

• ArrayList operations include adding, removing, and accessing elements.

• Example of inheritance: class Dog extends Animal

• Example of ArrayList operation: myList.add(element)

5S is a workplace organization method that aims to improve efficiency and productivity by eliminating waste and optimizing workflow.

• 5S stands for Sort, Set in Order, Shine, Standardize, and Sustain

• Sort involves removing unnecessary items from the workplace

• Set in Order involves organizing the remaining items in a logical and efficient manner

• Shine involves cleaning and maintaining the workplace

• Standardize involves creating and implementing standard procedures for maintaining th...read more

NC machines are manually operated while CNC machines are automated.

• NC machines require manual input for each movement while CNC machines are programmed to perform movements automatically.

• CNC machines are more precise and efficient than NC machines.

• NC machines are cheaper than CNC machines.

• Examples of NC machines include drill presses and lathes while examples of CNC machines include milling machines and laser cutters.

HashSet provides constant time performance for basic operations like add, remove, contains, while ArrayList does not.

• HashSet does not allow duplicate elements, while ArrayList allows duplicates.

• HashSet does not maintain insertion order, while ArrayList maintains insertion order.

• HashSet is faster for checking if an element exists (contains) compared to ArrayList.

OOPS concepts are fundamental to object-oriented programming. They include encapsulation, inheritance, polymorphism, and abstraction.

• Encapsulation: bundling data and methods that operate on that data within a single unit.

• Inheritance: creating new classes from existing ones, inheriting their properties and methods.

• Polymorphism: the ability of objects to take on multiple forms, depending on the context.

• Abstraction: hiding implementation details and exposing only the necessary i...read more

G-codes are used to control the movement of the machine while M-codes are used to control the machine's functions.

• G-codes control the movement of the machine, such as its speed, direction, and position.

• M-codes control the machine's functions, such as turning on or off the spindle or coolant.

• G-codes are used more frequently than M-codes in CNC programming.

• Examples of G-codes include G00 for rapid positioning and G01 for linear interpolation.

• Examples of M-codes include M03 for ...read more

Spring annotations for data-jpa

• The @Entity annotation is used to mark a class as a persistent entity

• The @Repository annotation is used to indicate that the class provides the mechanism for storage, retrieval, search, update, and delete operation on objects

• The @Transactional annotation is used to specify the transactional behavior of a method or class

• The @Query annotation is used to specify a JPQL or native SQL query

• The @Column annotation is used to specify the mapping of a pe...read more

I have a basic understanding of mapping and localization.

• I know that mapping involves creating a visual representation of an area, while localization involves determining the position of an object or person within that area.

• I am familiar with tools such as Google Maps and GPS devices that use mapping and localization technologies.

• I understand that mapping and localization are important in fields such as navigation, logistics, and robotics.

• I am eager to learn more about mappin...read more

Rewinding a 72 slot 50 hp motor involves disassembling the motor, removing the old windings, and replacing them with new windings.

• Disassemble the motor carefully to access the windings

• Remove the old windings without damaging the core

• Calculate the number of turns and wire gauge needed for the new windings

• Wind the new coils carefully and evenly in the slots

• Connect the windings properly and test the motor for functionality

A contactor relay is an electrical device used to control a high-power circuit with a low-power signal.

• Contactor relay consists of a coil, contacts, and an enclosure.

• When the coil is energized, it creates a magnetic field that pulls the contacts together to close the circuit.

• Contactor relays are commonly used in motor control circuits to start and stop motors.

• They can also be used in lighting control, heating systems, and other industrial applications.

Polymorphism in C++ allows objects of different classes to be treated as objects of a common superclass.

• Polymorphism is achieved through virtual functions and function overriding.

• It allows for more flexibility and extensibility in code.

• Example: A base class 'Shape' with virtual function 'draw', and derived classes 'Circle' and 'Square' that override 'draw'.

NO NC stands for Normally Open and Normally Closed. They refer to the state of a switch or relay when it is not activated.

• NO (Normally Open) - the switch is open (off) when not activated

• NC (Normally Closed) - the switch is closed (on) when not activated

• Used in electrical circuits to control the flow of current

• Commonly used in control panels, automation systems, and safety circuits

PID controller is a control loop feedback mechanism used in systems to control process variables.

• PID stands for Proportional, Integral, Derivative.

• Proportional term responds to the current error.

• Integral term corrects the accumulated error over time.

• Derivative term predicts future error based on current rate of change.

• Tuning involves adjusting the three parameters (P, I, D) to achieve desired system response.

• Example: In a temperature control system, PID controller adjusts the...read more

Star and delta are two different methods of connecting electrical motors.

• Star connection is used for motors that require high starting torque and low starting current.

• Delta connection is used for motors that require high running torque and high starting current.

• In star connection, the motor windings are connected in a triangular shape, while in delta connection, the windings are connected in a star shape.

• Star connection provides a lower voltage to each winding, while delta co...read more

Design of a spring involves determining its parameters based on the application requirements.

• The type of spring (compression, tension, torsion) must be chosen based on the application

• The material of the spring must be selected based on the required strength and durability

• The wire diameter, coil diameter, and number of coils must be determined based on the required spring rate and deflection

• The ends of the spring must be designed to fit the application (e.g. hooks, loops, or g...read more

Bukhoj relay is an electrical component used in robotic production systems.

• Bukhoj relay is a type of relay used in industrial automation.

• It is designed to handle high currents and voltages.

• Bukhoj relays are commonly used in robotic production lines to control various electrical components.

• They provide a reliable switching mechanism for controlling power circuits.

• Examples of applications include controlling motors, solenoids, and other high-power devices.

Industrial automation involves the use of control systems such as robots and computers to handle different processes and machinery in an industrial setting.

• Industrial automation helps improve efficiency and productivity by reducing human intervention in repetitive tasks.

• It involves the use of sensors, actuators, and controllers to monitor and control various processes.

• Examples of industrial automation include automated assembly lines, robotic welding, and automated packaging ...read more

OCP (Observation, Communication, and Patrol) process in security involves monitoring, reporting, and patrolling to ensure safety and security.

• Observation: Security officers must constantly observe their surroundings for any suspicious activity or potential threats.

• Communication: It is important for security officers to effectively communicate with their team members, as well as with clients and law enforcement if necessary.

• Patrol: Regular patrols of the premises help deter cr...read more

Earthing points are checked by using a multimeter to measure the resistance between the earthing point and the earth electrode.

• Use a multimeter set to the resistance mode

• Connect one probe to the earthing point and the other probe to the earth electrode

• Check the resistance reading on the multimeter

• A low resistance reading indicates a good earthing connection

• Repeat the process for all earthing points in the system

Addverb Technology offers innovative solutions and a dynamic work environment.

• Addverb Technology is a leader in the field of robotics and automation

• The company values creativity and encourages employees to think outside the box

• Addverb Technology has a strong track record of successful projects and satisfied clients

Fan rewinding is the process of replacing the copper wire coils in the stator of a fan motor to restore its functionality.

• Disconnect the fan from the power source before starting the rewinding process.

• Remove the fan blades and outer casing to access the stator.

• Carefully unwind the old copper wire coils from the stator and measure their length and gauge.

• Select the appropriate gauge and length of copper wire for rewinding.

• Wind the new copper wire coils in the same pattern and c...read more

PLC stands for Programmable Logic Controller, used in industrial automation to control machinery and processes.

• PLC is a digital computer used for automation of electromechanical processes.

• It uses a programmable memory to store instructions and specific functions.

• PLCs are commonly used in manufacturing plants, assembly lines, and robotic devices.

• They can be programmed using ladder logic, function block diagrams, or structured text.

• PLCs help in controlling inputs and outputs to...read more

Designing a fleet system for 100 robots requires careful planning and coordination.

• Consider the communication protocol between robots to ensure seamless coordination.

• Implement a centralized control system to monitor and manage the fleet efficiently.

• Include redundancy and fail-safe mechanisms to prevent system failures.

• Optimize routes and task assignments to maximize efficiency and productivity.

• Regular maintenance and updates to ensure the system operates smoothly.

• Example: Usi...read more

Security officers are responsible for maintaining a safe and secure environment by patrolling, monitoring surveillance equipment, and enforcing security policies.

• Patrol designated areas to prevent and detect signs of intrusion

• Monitor surveillance cameras and alarms

• Respond to emergencies and alarms

• Enforce security policies and procedures

• Write detailed incident reports

• Provide excellent customer service

Seeking new challenges and opportunities for growth

• Desire for career advancement

• Interest in taking on new responsibilities

• Looking for a more dynamic work environment

Strengths: Research skills, communication, adaptability, organization, teamwork. Weaknesses: Public speaking, time management, delegation, perfectionism, assertiveness.

• Strength: Strong research skills - able to gather and analyze data effectively

• Strength: Excellent communication skills - able to convey complex ideas clearly

• Strength: Adaptability - able to quickly adjust to new situations and challenges

• Strength: Strong organizational skills - able to manage multiple tasks effi...read more

A semiconductor is a material that has electrical conductivity between that of a conductor and an insulator.

• Semiconductors are used in electronic devices such as transistors, diodes, and integrated circuits.

• They have a band gap that allows them to selectively conduct electricity.

• Common semiconductor materials include silicon, germanium, and gallium arsenide.

• Semiconductors are crucial components in the field of electronics and play a vital role in modern technology.